package lab02.test16;

/**
 * Created by 123 on 2017/12/29.
 */
public abstract class Math {
    int add() {
        return 0;
    }

    int subtraction() {
        return 0;
    }

    int multipli() {
        return 0;
    }

    double division() {

        return 0;
    }


}
